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Texas Instruments TLC7705QP
- Part No.:
- TLC7705QP
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC7705QP.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,519
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Product details
Overview
TLC7705QP from Texas Instruments is a micropower supply voltage supervisor IC with fixed 4.55 V sense threshold, operating over –40°C to 125°C, supporting power-on reset, undervoltage detection, and programmable delay via external capacitor (td = 2.1 × 10⁴ × CT). It features totem-pole RESET/RESET outputs, 16 µA max supply current, and defined reset assertion down to VDD ≥ 1 V - used in industrial microcontroller systems requiring reliable brownout protection.
For engineers reviewing the TLC7705QP datasheet, TLC7705QP pinout, TLC7705QP application, or TLC7705QP equivalent, this page delivers verified electrical specs, package mapping to PDIP-8, functional timing behavior, real-world use cases in power-critical embedded systems, and validated alternative options for design continuity.
Technical Context
The TLC7705QP implements a precision voltage-sensing comparator with temperature-compensated internal reference and hysteresis (70 mV), monitoring SENSE input against a fixed 4.55 V threshold. Its internal timer initiates after VDD reaches ≥2 V and SENSE drops below threshold, delaying RESET deassertion by externally set td.
It supports dual-output active-high RESET and active-low RESET, with power-down control logic enabling automatic static RAM disable during power failure when CONTROL is grounded - requiring battery-backed VDD for memory retention mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports wide-input industrial rails including 3.3 V and 5 V systems. |
| Sense Threshold Voltage | 4.47 V (min) / 4.55 V (typ) / 4.63 V (max) - fixed precision threshold for 5 V supply monitoring. |
| Hysteresis | 70 mV - prevents output chatter near threshold during slow supply recovery. |
| Max Supply Current | 16 µA at VDD = 5 V - enables battery-operated or ultra-low-power applications. |
| Reset Assertion Voltage | VDD ≥ 1 V - ensures valid reset signal even during deep brownout conditions. |
| Delay Time Formula | td = 2.1 × 10⁴ × CT - allows user-defined reset hold time (e.g., 2.1 ms with 100 nF). |
| Operating Temperature | –40°C to +125°C - qualified for extended industrial and under-hood automotive environments. |
Pinout & Package
Package: PDIP-8 (Plastic Dual In-line Package, 0.300-inch width). Pin spacing conforms to JEDEC MS-001, lead finish is NiPdAu (RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Power rail connection; device operates from 2–6 V; RESET asserts when VDD ≥ 1 V. |
| GND | Ground reference | Return path for all internal circuitry and output drivers. |
| SENSE | Voltage monitor input | Monitors system supply; RESET activates when SENSE falls below 4.55 V threshold. |
| CONTROL | RAM power-down enable | When tied to GND, configures RESET as active-high and enables static RAM disable logic. |
| RESIN | Manual reset input | Active-low asynchronous reset override; pulls RESET low when RESIN < 0.2×VDD. |
| RESET | Active-high reset output | Drives microcontroller / processor reset line high during fault condition. |
| RESET | Active-low reset output | Complementary to RESET; drives low during fault; supports mixed-logic interface needs. |
| NC | No connect | Pin 1 is unconnected; no internal bond wire; must remain floating or grounded per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable delay time | Externally set via capacitor (CT); enables precise reset hold duration tuning without firmware changes. |
| Power-down control support | Direct interface to static RAM chip select (CS) during power loss - preserves data with battery backup. |
| Defined reset from VDD ≥ 1 V | Guarantees early reset assertion before core logic loses functionality - critical for safe shutdown. |
| Temperature-compensated reference | Maintains stable 4.55 V threshold across –40°C to 125°C - eliminates calibration drift in harsh environments. |
| Totem-pole outputs | Delivers strong drive capability (±2 mA) without external pull-ups - reduces BOM count and board space. |
Applications
| Industrial PLC Controller | Medical Imaging Power Sequencing |
|---|---|
Use Scenario: Monitors 5 V main supply in programmable logic controller during cold start and brownout events. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset and undervoltage lockout with 2.1 ms delay (100 nF). Use Value: Prevents CPU execution from corrupted state during unstable rail ramp-up; hysteresis avoids spurious resets during marginal operation. | Use Scenario: Ensures clean reset of FPGA-based image acquisition subsystem during AC-to-DC converter dropout. IC Role / Device Role / Timing Role: Supervises 5 V imaging sensor rail and triggers controlled shutdown sequence via CONTROL pin. Use Value: Enables seamless handoff to backup battery for SRAM retention - preserving last captured frame during power interruption. |
| Automotive Body Control Module | Energy Meter with Tamper Detection |
Use Scenario: Watches battery-derived 5 V rail in under-hood BCM exposed to thermal cycling and load dump transients. IC Role / Device Role / Timing Role: High-temp qualified supervisor asserting RESET until stable 5 V is confirmed and held for 2.1 ms. Use Value: Meets AEC-Q100 Grade 1 thermal requirements (–40°C to 125°C); 70 mV hysteresis rejects noise-induced false triggers. | Use Scenario: Detects intentional power removal attempts in utility meter by monitoring tamper-supply rail. IC Role / Device Role / Timing Role: Undervoltage detector triggering secure erase and nonvolatile flag set upon 5 V collapse. Use Value: 16 µA quiescent current extends battery life; defined reset at VDD ≥ 1 V ensures final write completes before cutoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC7705QPWR | TSSOP-8 package (3.0 × 4.4 mm), left-end taped/reel only; identical electrical specs and temp range. | Requires PCB redesign for surface-mount assembly; better thermal performance and smaller footprint than PDIP. | Select when space-constrained layout or automated pick-and-place is required; verify reflow profile for PW package. |
| TPS3808G33DBVR | 3.3 V fixed threshold, 1.5 µA IQ, open-drain RESET, -40°C to 125°C, SOT-23-6. | Lacks dual RESET/RESET outputs and CONTROL pin; no RAM power-down logic; lower current draw but no manual reset (RESIN). | Choose for ultra-low-power 3.3 V systems where dual outputs and memory control are unnecessary. |
Compared with TLC7705QPWR, the TLC7705QP offers through-hole assembly compatibility and higher thermal mass; versus TPS3808G33DBVR, it provides full legacy feature set (dual outputs, RESIN, CONTROL) at higher quiescent current but broader voltage supervision coverage.
Availability
TLC7705QP is available at Aetrix Electronics and suitable for industrial automation, medical imaging equipment, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC7705QP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The TLC77xx family was designed specifically for micropower voltage supervision in microcomputer and microprocessor systems - emphasizing reliability, low IQ, and robust reset timing under varying supply and temperature conditions.
FAQ
What is the exact sense threshold voltage of the TLC7705QP?
The TLC7705QP has a fixed negative-going input threshold voltage (VIT–) of 4.47 V (minimum), 4.55 V (typical), and 4.63 V (maximum) across its operating temperature range of –40°C to 125°C. This threshold is internally trimmed and temperature-compensated, making the TLC7705QP suitable for precise 5 V supply monitoring without external resistor networks.
Does the TLC7705QP support manual reset functionality?
Yes, the TLC7705QP supports manual reset via the RESIN pin, which is an active-low asynchronous input. When RESIN voltage falls below 0.2 × VDD, the device immediately asserts both RESET (high) and RESET (low), independent of SENSE voltage or delay timing. This allows field service or system-level reset initiation without relying on supply conditions - a key feature confirmed in the functional block diagram and timing tables of the SLVS087M datasheet.
Can the TLC7705QP be used to protect static RAM during power failure?
Yes, the TLC7705QP includes dedicated power-down control logic for static RAM with battery backup. When the CONTROL pin is tied to GND, the device configures RESET as active-high and enables automatic disabling of the memory's chip select (CS) line during supply collapse. This function requires the TLC7705QP's VDD to be powered from the backup battery - a capability explicitly documented in the "APPLICATION INFORMATION" section and Figure 10 of the SLVS087M datasheet.
What is the maximum allowable supply voltage for the TLC7705QP?
The absolute maximum supply voltage (VDD) for the TLC7705QP is 7 V, as specified in the Absolute Maximum Ratings table of the SLVS087M datasheet. However, the recommended operating range is 2 V to 6 V. Operation above 6 V risks permanent damage and violates functional specifications - especially critical in automotive or industrial systems where load dump transients may exceed nominal rails.
Is the TLC7705QP pin-compatible with other devices in the TLC77xx family?
Yes, all TLC77xx devices in the same package variant (e.g., PDIP-8) share identical pinouts, including TLC7705QP, TLC7703QP, TLC7725QP, and TLC7733QP. The SENSE pin maps to the same location across the family, and RESET/RESET/CONTROL/RESIN/VDD/GND/NC assignments are consistent - enabling direct substitution when only threshold voltage differs, provided system-level timing and hysteresis requirements are verified.
TLC7705QP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.55V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 1.1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TLC7705QP FAQ
1.How can I place an order for TLC7705QP through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7705QP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TLC7705QP reliable?
The price and inventory of TLC7705QP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7705QP is usually 5 days.
3.What payment methods are accepted for TLC7705QP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7705QP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7705QP?
TLC7705QP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7705QP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TLC7705QP?
For technical support, including TLC7705QP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7705QP requirements.
6.How does Aetrix verify that TLC7705QP is sourced from the original manufacturer or authorized distributors?
All TLC7705QP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLC7705QP meets industry standards.
7.What is the process for return or replacement of TLC7705QP?
All TLC7705QP units undergo pre-shipment inspection (PSI). If there is an issue with TLC7705QP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TLC7705QP part is unused and in its original packaging.
Return procedure for TLC7705QP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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